Casting-machine.



H. H. HEWITT.

CASTING MACHlNE.

APPLICATION FILED FEB. 13. 1912.

Patented Nov. 2, 1915.

3 SHEETSSHEET 1.

H. H. HEWlTT-. CASTING MACHINE. APPLICATION Flu-ID FEB. 13. 1912.1,158,921 Patented Nov. 2, 1915.

z l7 T W 1 l MW H. H. HEWITT.

CASTING MACHINE.

APPLICATION FILED FEB. I3 1912.

Patented Nov. 2, 1915.

3 SHEETS-SHEET 3- HERBERT H. HEWITT, OF BUFFALO, NEW YORK;

CASTING-MACHIN E.

Specification of Letters Patent.

Patented Nov. 2, 1915.

Application filed February 13, 1912. Serial No. 677,356.

To all whom it may concern Be it known that 'I, HERBERT H. .HEWITT, acitizen of the United States, and a resident of Buffalo, county of Erie,and State of New York, have invented certain new and useful Improvementsin Casting Machines, of which the following is a full, clear, and exactdescription.

The invention relates to casting machines and more particularly tomachines for cast- 1ng car truck side'frames of the type set forthin anapplication for Letters Patent filed by me December 8, 1911, Serial No.664,634. r

In the car truck set forth in this application, the side frames areprovided with central bearing openings by which they are swiveled to thetransverse connecting members of the truck to rock in vertical planes.The side-frames are also provided with longitudinally extending bearingopenings which rotatably receive studs on the journal boxesvtopermit-the rocking movement of the latter in transverse planes. Thepresent invention seeks to provide an improved machine for casting theside frames in which permanent metal cores are employed for forming thebearing openings and for providing the same with smooth surfaces whichneed not be subsequently machined.

The invention consists in the features of improvement hereinafter setforth, illustrated in the preferred form in the accompanying drawingsand more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a plan view of the improved machine. Fig.2is a longitudinal central section'thereof taken on the line 22 of Fig.3. Fig. 3 is a side elevation. Fig. 4 is a partial longitudinal sectiontaken on the lines 4-4 of Figs. 1 and 2. Fig. 5 is a detail section online 5-5 of Fig. 1 of the valve which controls one of the core operatingmotors. Fig. dis a vertical section taken on the lines 6 -6 of Figs. 1and 8.

Fig. 7---is a detail cross section taken on the line -7-7 of Fig. 1.Fig. 8 is a detail sectional view taken on the line 88,. Fig. 6. Fig. 9is a detail cross section taken on the line 99 of Fig. 2.

The frame of the machine comprises a horizontal bed plate- 10 which is'rectangular in outline and which is provided with end extensions 11.that are secured to suitable supports 12. The upper surface of therectann'nlar bed nlate 10 is raised somewhat above that of'the endextensions 11 and is adapted to sustain the mold. The under side of the.bed plate 10 and of the extensions 11 are provided with strengtheningribs and the bed plate is centrally sustained upon a series of uprights13 (see Figs. 3 andv 8) which rise from the upper end of a verticallydisposed cylinder 14:. The fluid pressure cylinder 14, in the formshown, is arranged within a pit 15 in the foundation 16 and at its lowerend is provided with a flange 17 through which extend a number of bolts18 to secure the cylinder to the foundation.

The car truck side frame which is cast by the machine is diamond shapein outline and .comprises a large central portion a and the oppositepairs of converging arms I) whlch' extend from the central portion andwhich are connected at their outer ends by hub-like parts a. The centralportion is provided with projecting bosses (Z in line with the hubs cand the hubs and bosses c and d are provided with hearing openings forstuds on the'journal boxes. The central portion a of the truck isprovided with a transverse bearing opening and this central portion andthe arms. I) are formed of a central web having strengthening flanges atits inner and outer edges. a

-The side frame is cast in a two-part mold the parting line of whichextends through the central longitudinal plane of the side frame. In theconstruction shown, a sand mold is employed which is formed within aflask comprising an upper section or cope 19 and a lower section or drag20. The flask is preferably formed of cast metal and. the meeting edgesof the sectionsthereof are provided with outwardly projecting flanges21.

The flange of the lower section or drag is from the lower'section. Eachsection of the flask is provided with a series of' transverse andlongitudinal ribs 23 and 2 1 which aid in sustaining the mold formedinthe flask, but

which are cut away, as indicated in Figs. 6, 7 and 9, so that theydo notextend to the cavity of the mold. Each section of the flask isalsoprovided at its upper central portion with a circular rib 25 which isintegral with the transverse and longitudinal ribs 23 and 24 and whichis provided with a series of inwardly projecting radial lugs 26.

These lugs at the upper and lower portions of the flask are arranged toengage a vertitically movable cylindrical, metal core 27 which isadapted to form the central hearing opening of the side frame. extendsthrough and is guided within a central flanged opening in the bed plate10 and is connected to the upper end of a vertical piston rod 29. Thepiston rod extends through a stuffing box 30 on the head 31 of thecylinder 14 and is connected to a piston 32 within the cylinder. Thelower portion of the permanent core 27 is preferably larger than itsupper portion. so that it is'provided witha shoulder 27 which forms theouter edge of the flange about the central bearing opening.

A supply pipe 34 'having a cut-off valve 35 therein (see Fig. 3) isconnected by the casing of a four-way valve 36 to a pair of:

branch pipes 37 leading to opposite ends of the cylinder 14. The casingof the fourway valve 36 is provided with an exhaust port and the stem ofthe arm is provided with a crank arm 38. By shifting the valve eitherend of the cylinder may be connect ed to the supply pipe 34 and theopposite end to the atmosphere. Air or other suitable fluid underpressure is supplied to the pipe 34 and by shifting the valve 36, isadmitted alternately to the opposite ends of the cylinder 14 to shiftthe piston 32 back and forth and advance and withdraw the core 27 whichextends transversely through the bed'plate 10 and transversely throughthe sections of the mold which removably mounted upon the bed plate.

A pair of cylindrical metal cores 39 are shiftable through the ends ofthe sectional flask and mold and are preferably guided throughsemi-cylindrical flanged parts 40 v formed upon the upper and lowersections of the flask. These cores are provided with reduced cylindricalportions 39 which form the bearing openings in the ends -0 of the sideframe and at their inner ends the cores are provided with still furtherreduced porouter ends of the cores 39. For this pur-- pose the outerends of the cores and the inner ends of the piston rods are provided.with enlarged heads 47 which are adapted to abut and be retained.within cavities formed in the upper and lower sections 48 and 49 of asliding coupling. The lower sections 49 are guided upon raised surfacesThe core 27 50 on the frame extensions 11 and the upper sections areconnected to the lower sections by hinged pintles 51. The opposite endsof the upper and lower sections 48 and 49 of the coupling are connectedby a bolt 52, the head of which is. arranged within a recess in thelower section 49 and engages a transverse pin 53 by which the bolt 52 isswiveled to the lower section. to extend through a notch in the end ofthe upper section 48 of the coupling and a hand wheel 54 threaded uponthe upper end of the spectively, of the cylinders 44. The cas ings ofthe four-way valves 57 (see Fig. 5)

are provided with ports 59 open to the atmosphere and the stems of theValves are provided with crank arms 60. By shifting the valves eitherend of the cylinder may be connected to the supply pipe and the oppositeend to the atmosphere. so that the pistons can be operated to withdrawthe cores.

The arms 60 on the four-way valves 57 and the arm 38 on the four-wayvalve 36 are all preferably connected toa common controlling lever 61which is pivotally mounted upon a stud 62 on one of the side edges ofthe bed plate 10. For this purpose a. pair of links 63 are connected attheir outer ends to the arms 60 and at their inner ends are pivotallyconnected to the lever 61 by a bolt 64. The lever 61 is provided with acrank arm 65 and this crank arm is connected to the arm 38 of the valve36 by a link 66. In the operation of the machine The bolt 52. is adaptedit is desirable to start the operation of the pistons 43 of thecylinders 44 to withdraw the cores 39 before the cylinder 14 is throwninto operation to withdraw the core 27. For this purpose the link 66 isprovided with a. pin 67 in its upper end which extends through atransverse slot 68 (indicated by dotted lines in Fig. in the arm 65.

In the operation of the machine, the sections of the flask and the cores39 are removed fr-om the machine and the sand mold is formed thereinwith the cores 39 in their innermost position. It should be noted thattwo of the transverse flanges 23 of the upper and lower flask sectionsare arranged to engage the inner portion of the body of the core 39 (seeFigs. 4 and 7) to hold it iii proper central position In forming thesand mold, a coresimilar to the core 27 is temporarily placed inposition. In the particular form shown, the side frame is provided withkeyopenings which extend inwardly in the central bearing opening thereofand which key openings are intersected by bolt openings. These key andbolt openings are formed by sand cores 67.-

I '45 by the coupling sections 48 and'49. In

this way, the mold sections are properly centered upon the machine. Thecontrolling lever 61 is then further shifted to operate the valve 36 andmove the piston 32 of the cylinder 14 upwardly so that the core 27 isadvanced into the mold. When the core 27 is in position it is engaged bythe radial lugs 26 on the rings or ribs 25 of the upper and lower flasksections. The upper end of the core is slightly smaller than its lowerend so that the lugs 26. on the upper flask section are longer thanthose upon the lower section, as indicated in Fig. 4. These lugs serveto properly position the mold and the cavity thereof with reference tothe core 27.

\Vhen' the parts are in position,the mold cavity is filled with molteniron and the cores 2'? and 39 serve to form smooth sur-.

faces upon the several bearing openings of the side frame, so that theseopenings need not be subsequently machined. The lever (31 or othersuitable controlling means is operated to admit air to the inner ends ofthe cylinders 19: andlat to withdraw the cores 27 and 39, before thesurfaces formed by the cores are unduly chilled. This can be quicklyeffected at the proper time in the preferred form of the machine shownby manipulating the lever 61. The lower flask section 20 is providedwith a series of pins 68 (see Figs. 2 and 9). There are four of thesepins in the form shown and theyare arranged to project upwardly from thelower portion of the flask to the face of the mold cavity, so that theyengage'the web of the side frame which is formed in the mold cavity.These pins serve to support the central portion of the side frame as thecore 27 is withdrawn and thereby prevent the withdrawal of the core fromdistorting the casting. The cores 39 are shifted slightly in advance ofthe core 27 which serves to hold the mold in position as the cores 39are withdrawn.

It is obvious that numerous ch'angesmay be made in the details set forthwithout departure from the essentials of the invention as defined in theclaims. I claim as my invention 1. In a casting'machine, the combinationwith the machine frame, of a sectional mold supported thereon,areciprocating metal core arranged to extend transversely through themold sections, a pair of opposed, reciprocating, metal cores arranged toextend longitudinally through the ends of the mold, said mold havingmetal portions engaging said cores, and means for withdrawing saidcores, substantially as described.

2. In a casting machine, the combination with the machine frame, of asectional mold supported thereon, a reciprocating metal core arranged toextend transversely through the mold sections, a pair of opposed,reciprocating, metal cores arranged to extend longitudinally through theends of the mold, said mold having metal portions engaging said cores,and fluid pressure motors connected to said cores for withdrawing thesame, substantially as described.

3. In a casting machine, the combination with the machine frame, of asectional mold supported thereon, a reciprocating metal core arranged toextend transversely through rocating, metal cores arranged to extendIlon itudinally through the ends of the mold,

sai mold having metal portions engaging said cores, fluid pressuremotors havmg movable members directly connected to said the moldsections, a 'pair. of opposed, recipin horizontal position on saidframe, a vertically reciprocating, cylindrical, metal core guided insaid frame and arranged to exi tend transversely through said'moldsections, a pair of opposite, cylindrical, hori- Zontally reciprocatingmetal cores arranged to extend through the ends of said mold between thesections thereof, said mold having metal portions arranged to engagesaid cores, said cores being adapted to form bearing openings in thecasting, and means for withdrawing said cores from the openings formedthereby, substantially as described.

5. In a casting machine, the combination with a frame, of a sectionalmold supported in horizontal position on said frame, a verticallyreciprocating, cylindrical, metal core guided in said frame and arrangedto extend transversely through said inold sections. a pair of opposite,cylindrical, horizontally reciprocating metal cores arranged to extendthrough the ends of said mold between the sections thereof, said moldhaving metal portions arranged to engage said cores, said cores beingadapted to form bearing openings in the casting, a number of fluidpressure motors arranged in line with said cores and having movablemembers connected thereto, and valves controlling the operation of saidmotors,,substantially as described.

6. In a casting machine, the combination with a frame, of a sectionalmold supported in horizontal position on said frame, a verticallyreciprocating, cylindrical, metal core guided in said frame and arrangedto extend transversely through said mold sections, a pa r of opposite,cylindrical, horizontally reciprocatlngmetal cor-es arranged to extendthrough the ends of said mold between the sections thereof, said moldhaving metal portions arranged to engage said cores, said cores beingadapted to form bearing openings in the casting, a number of fluidpressure motors arranged in line with said cores and having movablemembers directly connected thereto, valves controlling the operation ofsaid motors, and a common shift lever connected to said valves,substantially as described.

7. In a casting machine, the combination with a horizontal bed plate, ofa sectional mold removably mounted thereon, a metala pair of opposed,horizontally reciprocat lng, metal cores extending through theends ofsaid mold, a pair of fluid pressure motors mounted upon the-ends of saidbed plate. and means for detachably coupling said cores to the movablemembers of said motors, substantially as described.

9. In a casting machine, the combination with a horizontal bed plate, ofa sectional mold removably mounted on said bed plate,- a verticallyreciprocating metal core guided in an opening in said bed'plate andarranged to extend transversely through said mold sections, each ofsaidmold sections having circular metal portions arranged to engage saidcore, a pair of opposed, horizontally reciprocating, meta-lcoresarranged to extend through the ends of said mold between the sectionsthereof, said sections having met-a1 portions arranged to engage saidhorizontally reciprocating cores, and means for withdrawing said coresfrom the opening in the casting formed thereby, substantially asdescribed.

i 10. In a casting machine, the combination with a horizontal bed plate,of a sectional zontally reciprocating, metal cores arranged to extendthrough the ends of said mold between the sections thereof, saidsections having metal portions arranged to engage said horizontallyreciprocating cores, a number of motor cylinders arranged in line withsaid cores and having pistons connected thereto, and means forcontrolling the flow of motive fluid to and from said cylinders,

substantially as described.

11. In a casting machine, the combination with a horizontal bed plate,of a sectional mold removably mounted on said bed plate,

a vertically reciprocating metal core gulded in an opening in said bedplate and arranged to extend transversely through said mold sections,each of said mold sections having circular metal portions arranged toengage said core, a pair of opposed, horizontally reciprocating, metalcores arranged to extend through the ends of said mold between thesections thereof, said sections having metal portions arranged to engagesaid horizontally reciprocating cores, a motor cylinder below said bedplate having a piston connected to said vertically reciprocating core, apair of motor cylinders mounted on the ends of said bed plate and havingpistons connected to said horizontally reciprocating cores, and a commonshifter for controlling the flow of motive fluid to and from saidcylinders, substantially as described.

12. In a casting. machine, the combination with a horizontal bed plate,of a sectional mold removably mounted on said bed plate,

' avertically reciprocating metal core guided in an opening in said bedplate and arranged to extendvtransversely through said mold sections,each of said mold sections having circular metal portions arranged toengage said core, a pair of opposed, horizontally reciprocating, metalcores arranged to extend through the ends of said mold between thesections thereof, said sections having metal portions arranged to engagesaid horizontally reciprocating cores, a motor cylinder below said bedplate having a: portion connected to said vertically reciprocating core,a pair of motor cylinders mounted on the ends of said bed plate andhaving pistons therein, and couplings for detachably connecting saidpistons to said horizontally reciprocating cores, substantially asdescribed. r

13. In a casting machine, the combination with a bed plate, of asectional metal flask for sustaining a sand mold removably mounted onsaid bed plate, a vertically reciprocating metal core extending throughsaid bed plate and arranged to extend transversely through said flask, apair of opposed, horizontally reciprocating, metal cores arranged toextend longitudinally through the ends of said flask between thesections there;- of, said flask having uiding portions arranged toengage sa-i cores, and-means for withdrawing said cores from theopenings formed thereby, substantially as described.

14. In a machine for casting car truck Bide frames, the combination withthe machine frame, of amold comprising upper and lower sectionssustained in horizontal position on the frame, a verticallyreciprocating cylindrical, metal core arranged to extend transverselythrough the mold sections to form a centralbearing opening, saidsections having circular metal guide portions arranged to engage saidcore on opposite sides of the mold cavity, and a fluid pressure motorfor reciprocating said core, substantially as described.

,15. In a machine for casting car truck side frames, the combinationwith the machine frame, of a mold comprising upper and lower sectionssustained in horizontal position on said frame, a vertically recipsideframes, the combination with the machine frame, of a mold comprisingupper and lower sectlons sustained in horizontal posltlon on said frame,a vertically reciprocating metal core arranged to extend through saidupper and lower mold sections, a pair of opposed, horizontallyreciprocating cores arranged to extend through the ends of said moldbetween said sections, the

latter having metal guiding portions arranged to engage said cores,fluid pressure motors arranged in line with said cores and havingmovable members directly connected thereto, and a common controllinglever for said motors, substantially as described.

HERBERT H. HEWITT. Witnesses:

GEO. P. FISHER, KATHARINE GERLACH.

